A General Condition for Two Coherent Waves to Undergo Constructive

question 55

Multiple Choice

A general condition for two coherent waves to undergo constructive interference is that

• A) their phase difference is zero.
• B) their phase difference is π/2 rad.
• C) their phase difference is ±π/2 rad.
• D) their phase difference is an even integral multiple of π rad.
• E) their phase difference is an odd integral multiple of π rad.

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